Genetic variation of an endangered Malagasy frog, <Emphasis Type="Italic">Mantella cowani</Emphasis>, and its phylogeographic relationship to the widespread <Emphasis Type="Italic">M. baroni</Emphasis> |
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Authors: | Ylenia?Chiari Franco?Andreone Miguel?Vences Email author" target="_blank">Axel?MeyerEmail author |
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Institution: | (1) Lehrstuhl für Zoologie und Evolutionsbiologie, Department of Biology, University of Konstanz, 78457 Konstanz, Germany;(2) Museo Regionale di Scienze Naturali, Sezione di Zoologia, 10123 Torino, Italy;(3) Zoological Institute, Technical University of Braunschweig, Spielmannstr. 8, 38106 Braunschweig, Germany |
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Abstract: | We investigated the degree and distribution of the genetic variation, and phylogeography, of two species of Malagasy poison
frogs, Mantella cowani and M. baroni. The former is critically endangered due to its restricted distribution, habitat destruction and overcollection for the pet
trade. Analysis of 526 bp of mtDNA (cytochrome b) resulted in separate haplotype networks for the two species, and discovered hybridization at a single locality. The two
networks confirm the status of M. baroni and M. cowani as separate evolutionary species and units for conservation. Within both mitochondrial haplotype networks, specimens from
different localities shared numerous identical haplotypes, even those from the most distant sample sites of M. baroni. Most populations were characterized by high haplotype diversity and no haplotype clades exclusive to geographical regions
were observed. Protection of a few large populations of these species is therefore likely to conserve much of the mtDNA genetic
diversity found in the entire species. While M. baroni is widespread and occurs in many nature reserves, we recommend efficient legal protection of some M. cowani habitats to protect this species against extinction. |
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Keywords: | Amphibia Mantella baroni Mantella cowani cytochrome b hybridization |
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